You have landed on Mars, and observe that it takes a stone 1.8 sec to fall 6 m. (A) What is the acceleration of gravity on Mars?
(B) How much does a 2 kg stone weigh on Mars?
(C) If you could jump to a height of 1.5 m on Earth, how high can you jump on Mars?
(D) If you knew that the mass of Mars was 6.4 x 1023 kg, what would you deduce is its radius?
(E) The Martian moon Deimos has a mass of 3 x 10-9 that of Mars itself. If Deimos is 2.3 x 107 m away from Mars, how strongly does Mars pull on its small satellite?

•• al and bert are jogging side-by-side on a trail in the woods at a speed of 0.75 m/s. suddenly al sees the end of the trail 35 m ahead and decides to speed up to reach it. he accelerates at a constant rate of 0.50 m/s2, while bert continues on at a constant speed. (a) how long does it take al to reach the end of the trail? (b) once he reaches the end of the trail, he immediately turns around and heads back along the trail with a constant speed of 0.85 m/s. how long does it take him to meet up with bert? (c) how far are they from the end of the trail when they meet?

What is required for an electric charge to flow through a wire? zero resistance in the wire a balance of electric potential high resistance in the wire a difference in electric potential

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?